sound/soc/kirkwood/kirkwood-openrd.c

   1 /*
   2  * kirkwood-openrd.c
   3  *
   4  * (c) 2010 Arnaud Patard <apatard@mandriva.com>
   5  *
   6  *  This program is free software; you can redistribute  it and/or modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/slab.h>
  17 #include <sound/soc.h>
  18 #include <mach/kirkwood.h>
  19 #include <plat/audio.h>
  20 #include <asm/mach-types.h>
  21 #include "kirkwood-i2s.h"
  22 #include "kirkwood-dma.h"
  23 #include "../codecs/cs42l51.h"
  24
  25 static int openrd_client_hw_params(struct snd_pcm_substream *substream,
  26                 struct snd_pcm_hw_params *params)
  27 {
  28         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  29         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  30         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  31         int ret;
  32         unsigned int freq, fmt;
  33
  34         fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;
  35         ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
  36         if (ret < 0)
  37                 return ret;
  38
  39         ret = snd_soc_dai_set_fmt(codec_dai, fmt);
  40         if (ret < 0)
  41                 return ret;
  42
  43         switch (params_rate(params)) {
  44         default:
  45         case 44100:
  46                 freq = 11289600;
  47                 break;
  48         case 48000:
  49                 freq = 12288000;
  50                 break;
  51         case 96000:
  52                 freq = 24576000;
  53                 break;
  54         }
  55
  56         return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);
  57
  58 }
  59
  60 static struct snd_soc_ops openrd_client_ops = {
  61         .hw_params = openrd_client_hw_params,
  62 };
  63
  64
  65 static struct snd_soc_dai_link openrd_client_dai[] = {
  66 {
  67         .name = "CS42L51",
  68         .stream_name = "CS42L51 HiFi",
  69         .cpu_dai = &kirkwood_i2s_dai,
  70         .codec_dai = &cs42l51_dai,
  71         .ops = &openrd_client_ops,
  72 },
  73 };
  74
  75
  76 static struct snd_soc_card openrd_client = {
  77         .name = "OpenRD Client",
  78         .platform = &kirkwood_soc_platform,
  79         .dai_link = openrd_client_dai,
  80         .num_links = ARRAY_SIZE(openrd_client_dai),
  81 };
  82
  83 static struct snd_soc_device openrd_client_snd_devdata = {
  84         .card = &openrd_client,
  85         .codec_dev = &soc_codec_device_cs42l51,
  86 };
  87
  88 static struct platform_device *openrd_client_snd_device;
  89
  90 static int __init openrd_client_init(void)
  91 {
  92         int ret;
  93
  94         if (!machine_is_openrd_client())
  95                 return 0;
  96
  97         openrd_client_snd_device = platform_device_alloc("soc-audio", -1);
  98         if (!openrd_client_snd_device)
  99                 return -ENOMEM;
 100
 101         platform_set_drvdata(openrd_client_snd_device,
 102                         &openrd_client_snd_devdata);
 103         openrd_client_snd_devdata.dev = &openrd_client_snd_device->dev;
 104
 105         ret = platform_device_add(openrd_client_snd_device);
 106         if (ret) {
 107                 printk(KERN_ERR "%s: platform_device_add failed\n", __func__);
 108                 platform_device_put(openrd_client_snd_device);
 109         }
 110
 111         return ret;
 112 }
 113
 114 static void __exit openrd_client_exit(void)
 115 {
 116         platform_device_unregister(openrd_client_snd_device);
 117 }
 118
 119 module_init(openrd_client_init);
 120 module_exit(openrd_client_exit);
 121
 122 /* Module information */
 123 MODULE_AUTHOR("Arnaud Patard <apatard@mandriva.com>");
 124 MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
 125 MODULE_LICENSE("GPL");
 126 MODULE_ALIAS("platform:soc-audio");